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vendor/yiisoft/yii2/db/conditions/ExistsConditionBuilder.php

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+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\db\conditions;
+
+use yii\db\ExpressionBuilderInterface;
+use yii\db\ExpressionBuilderTrait;
+use yii\db\ExpressionInterface;
+
+/**
+ * Class ExistsConditionBuilder builds objects of [[ExistsCondition]]
+ *
+ * @author Dmytro Naumenko <d.naumenko.a@gmail.com>
+ * @since 2.0.14
+ */
+class ExistsConditionBuilder implements ExpressionBuilderInterface
+{
+    use ExpressionBuilderTrait;
+
+
+    /**
+     * Method builds the raw SQL from the $expression that will not be additionally
+     * escaped or quoted.
+     *
+     * @param ExpressionInterface|ExistsCondition $expression the expression to be built.
+     * @param array $params the binding parameters.
+     * @return string the raw SQL that will not be additionally escaped or quoted.
+     */
+    public function build(ExpressionInterface $expression, array &$params = [])
+    {
+        $operator = $expression->getOperator();
+        $query = $expression->getQuery();
+
+        $sql = $this->queryBuilder->buildExpression($query, $params);
+
+        return "$operator $sql";
+    }
+}